Plug retainer



Aug. 30, 1932. K. A. BRAUNING FLUG RETAINER Filed May 4. 1929 MAB/WW ATTORNEY Patented Aug. 30, 1932 UNITED STATES KARL A. BRAUNING, or STAMFORD, CONNECTICUT, AssIGNoR T THEVYAIQJE a Town MANUFACTURING COMPANY, or sTAMroRD, CONNECTICUT {PLUG RETAINER Application filed May 4,

This invention relates to cylinder looks,

more especially to meansvfor securing the plug of a cylinder lock within the cylinder. 'It has been customary in securing a plug within its cylinder, to screw a retaining cap member which may be inserted in a slot in a plug extension for maintaining the plug within the cylinder. This method obviates the former danger incidentto the loosening of the screws. and furnishesa readily releasable means for removing the plug when de: sired.

' For a more detailed description of my in: vention, I refer to the drawing wherein Fig. 1 is an elevation of my cylinder showing a connecting bar attached thereto. Fig. 2 is an end view of the same. Fig. 3 is a view of my spring slide retaining member. Fig. 4: is a view of the connecting bar. Fig. 5 is a view of the plug showing the dovetail slot for the retention of the spring retaining member. Fig. 6 is a section through the plug showing my retaining member in position and the connecting bar in its relationship to the plug. Fig. 7 is an enlarged viewrof the end of the plug in'Fig. 2.

Referring more particularly to the drawing, reference numeral 10 designates a cylinder adapted for the usual type of plug 11 which in turn is equipped with a dove-tail slot 12 as shown in Fig. 5. A connecting bar 13 is adapted to fit into the deep portion l of the slot 12 for operation by the plug and is secured there in a manner to be described presently. The plug 11 has an extending portion 15 extending beyond the rear wall 16 of the cylinder and as shown, the horizontal portion 17 of the dove-tail slot 12 is adapted to assume a position'in juxtaposition to said cylinder wall 16 for a purpose hereinafter exspring arms, said slide being'adapted to rest plained.

A spring retainer slide 18 is shown in Fig.

' 3. This retainer slide is slotted at 19 to form sired, so that they may enter the horizontal 1929. Serial-No. 360,485;

portion; 17 of the dove-tail slot 12. Once these spring arms are allowed to go beyond the slot, they will spring outwardly, as shown in Figs. (Sand 7, and the retainer 18 will rest against. the end wall ity of the cylinder to re-.

tain theplug' therein; In addition to its function as ameans for supplying the necessary spring action, the "retainerslo-t19 is utilized to maintain the connecting bar 13 in position. The lugs 20 of this connecting-bar lie in the deep portion 14; of the dove-tail1slot12 and sincethey are adapted to extend beyond the 7 slot 19., the retainer'18 will be able to hold the bar 13 within the'plug in the, manner shown.

' .I claim:

- I 1. Ina cylinderlock, a-plugextending beyond the rear cylinder wall, an internal diametric dove tailedslot insaidplug extension, and aspring retainer slide adapted to .fit in said slot and to be contained entirely within the plug except at it's ends which cooperate with the cylinder to maintain the plug in beyond the rear cylinder wall, an internal diametric slot in said extending portion in juxtaposition to said cylinder wall, and a slotted retaining member having spring arms pressing outwardly against the walls of the slot andadapted to be'removably inserted in said slot to retain the plug in said cylinder 4. In a cylinder lock, a plug extending beyond the rear cylinder wall, aslot in said extending portion, a slide having one end thereof enlarged and the other end comprising in said slot and have its ends extend outside the slot and againstsaid-rear cylinder wall to retain the plug within the cylinder.

5. In a cylinder lock, a plug extending beyond the rear cylinder wall, a slot in' said ex-, 7

tending portion, a connecting bar, and releasable spring means adapted to carry said connecting bar and then to enter said slot With said connecting bar to retain the plug in the cylinder and operatively attach said bar to the plug.

6. In acylinder lock, a plug carried by said cylinder, a slot in said plug, a connecting bar and a slide adapted to carry said bar and to enter said plug slot. v

7. In a cylinder look, a plug having its rear end extending beyond the cylinder, .aslot in said extension, a connecting bar, and a slide adapted to carry said connecting bar and to be maintained in said plug slot.

' 8. In a cylinder look, a plug having one end extending beyond the rear end of the cylinder, :a slot in said extension in juxtaposition to the end of said cylinder, a connecting bar, a slide adapted to carryvsaid connecting bar and to be maintained in said plug slot to retain the plug in said cylinder.

9. In a cylinder lock, 21 key plug extending beyond the rear cylinder Wall, a dove tailed slot in said plug, a connecting barfhaving a headed end resting in a portion of said slot, a periiorated slide having spring arms and adapted to be spring pressed into said slot to maintain the plug in the cylinder, said slide having its perforated portion cooperable With said connecting bar and said headed portion to maintain the connecting bar in said Signed at Stamford in the county of Fairfield and State of Connecticut this first day of 7 May A. n. 1929. I

KARL A. BR-AUNING. 

